We only list UK sizes. If you're not sure what your UK size is, please click on ‘Size advisor’ or review our size guides.
When the temperature drops, beat the chill in our merino wool-blend thermal long johns. Regular fit with an elasticated waist and cuffed bottoms for snug and secure wear. Functional keyhole fly opening. Maximum warmth fabric combines insulation with breathability, so you stay cosy and comfortable in extremely cold conditions. Brushback texture feels gentle against your skin, while supersoft seams ensure there's no chafing.
You may return unused products within 35 days of purchase.
How to return:
1. FREE instant returns in store. The select M&S click and collect stores can be found here
2. Returns Hub. Drop your package at your nearest post office using a pre-paid label. The cost of postage is provided at a discounted rate and will be deducted from your refund. Select this option and print your label here.
3. Self-postage return to the UK. Return your parcel at your own cost through your preferred carrier. Print your returns label and note here.
Express delivery: 5-7 working days. FREE over €60, otherwise €7.95.
Store collection: 5-7 working day. FREE to collect in select stores.